Control device for gearbox

Patent metadata

Field	Value
Publication number	US-12104689-B2
Application number	US-202218693536-A
Country	US
Kind code	B2
Filing date	Aug 29, 2022
Priority date	Sep 23, 2021
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A control device for a gearbox which includes a mechanical pump and an electric pump, the control device including a sensor module configured to detect a system oil pressure of a lubricating oil of the gearbox, a differential, a clutch, a brake, and a control module. The differential includes an input bevel gear meshing with a bevel pinion of an output shaft of the gearbox, a differential housing connected to the input bevel gear, and a first half shaft and a second half shaft which are provided in the differential housing and mesh with a bevel pinion of the differential housing. The second half shaft is connected to an input of the mechanical pump. The brake includes a brake caliper, a brake disc, and a brake disc shaft fixedly connected to the brake disc. The brake disc shaft is fixedly connected to the first half shaft.

First claim

What is claimed is:

1. A control device for a gearbox which comprises a mechanical pump and an electric pump, the control device comprising:
a sensor module configured to detect a system oil pressure of a lubricating oil of the gearbox;
a differential;
a clutch;
a brake; and
a control module, wherein:
the differential comprises an input bevel gear meshing with a bevel pinion of an output shaft of the gearbox, a differential housing connected to the input bevel gear, and a first half shaft and a second half shaft which are provided in the differential housing and mesh with a bevel pinion of the differential housing, wherein the second half shaft is connected to an input of the mechanical pump,
the brake comprises a brake caliper, a brake disc, and a brake disc shaft fixedly connected to the brake disc, wherein the brake disc shaft is fixedly connected to the first half shaft,
an outer disc of the clutch is connected to the differential housing, and an inner disc of the clutch is sleeved on the first half shaft, and
the control module is configured to actuate, when the system oil pressure is below a system oil pressure threshold, the brake caliper to clamp the brake disc and release the clutch, such that a rotation speed of the first half shaft is zero, and a rotation speed of the second half shaft is twice that of the differential housing, and the control module is configured to release the brake caliper and close the clutch when the system oil pressure is above the system oil pressure threshold, such that the inner disc and the outer disc rotate synchronously, and the rotation speed of the first half shaft is the same as that of the second half shaft.

2. The control device according to claim 1 , wherein the control module comprises a two-position four-way valve, the two-position four-way valve comprising an oil inlet and an oil outlet which are connected to an oil tank, a first oil port connected to the brake, and a second oil port connected to the clutch,
wherein when the system oil pressure is below the system oil pressure threshold, a valve core of the two-position four-way valve is located in a first position, such that a passage is established between the first oil port and the oil inlet to actuate the brake caliper, and a passage is established between the second oil port and the oil outlet to release the clutch, and
wherein when the system oil pressure is above the system oil pressure threshold, the valve core of the two-position four-way valve is located in a second position, such that a passage is established between the second oil port and the oil inlet to close the clutch, and a passage is established between the first oil port and the oil outlet to release the brake caliper.

3. The control device according to claim 2 , wherein the two-position four-way valve is hydraulically controlled, or controlled through an electrical signal.

4. The control device according to claim 2 , wherein the two-position four-way valve is provided with a damping hole.

5. The control device according to claim 1 , wherein:
the sensor module is further configured to detect a first oil pressure of the mechanical pump, and a second oil pressure of the electric pump, respectively, and
the control module is configured to actuate, when the first oil pressure is below a first threshold, and the second oil pressure is below a second threshold, the brake caliper to clamp the brake disc and release the clutch, such that the rotation speed of the first half shaft is zero, and the rotation speed of the second half shaft is twice that of the differential housing, the control module is configured to release the brake caliper and close the clutch the first oil pressure is above the first threshold, and the second oil pressure is below the second threshold, such that the inner disc and the outer disc rotate synchronously, and the rotation speed of the first half shaft is the same as that of the second half shaft, and the control module is configured to release the brake caliper and the clutch when the second oil pressure is above the second threshold, such that the rotation speed of the second half shaft is zero, and the rotation speed of the first half shaft is twice that of the differential housing.

6. The control device according to claim 5 , wherein the control module comprises a two-position four-way valve, a first two-position three-way valve, and a second two-position three-way valve,
wherein the two-position four-way valve comprises an oil inlet and a first oil outlet which are connected to an oil tank, a first oil port, and a second oil port,
wherein the first two-position three-way valve comprises a second oil outlet, a third oil port connected to the first oil port, and a fourth oil port connected to the brake,
wherein the second two-position three-way valve comprises a third oil outlet, a fifth oil port connected to the second oil port, and a sixth oil port connected to the clutch,
wherein when the first oil pressure is below the first threshold, and the second oil pressure is below the second threshold, valve cores of the two-position four-way valve, the first two-position three-way valve and the second two-position three-way valve are each located in a first position, such that passages are established between the first oil port and the oil inlet, and between the third oil port and the fourth oil port, respectively, to actuate the brake caliper, and passages are established between the fifth oil port and the sixth oil port, and between the second oil port and the first oil outlet, respectively, to release the clutch,
wherein when the first oil pressure is above the first threshold, and the second oil pressure is below the second threshold, the valve core of the two-position four-way valve is located in a second position, and the valve cores of the first two-position three-way valve and the second two-position three-way valve are each located in the first position, such that passages are established between the second oil port and the oil inlet, and between the fifth oil port and the sixth oil port, respectively, to close the clutch, and passages are established between the first oil port and the first oil outlet, and between the third oil port and the fourth oil port, respectively, to release the brake caliper, and
wherein when the second oil pressure is above the second threshold, the valve cores of the first two-position three-way valve and the second two-position three-way valve are each located in the second position, such that a passage is established between the fourth oil port and the second oil outlet to release the brake caliper, and a passage is established between the sixth oil port and the third oil outlet to release the clutch.

7. The control device according to claim 6 , wherein the two-position four-way valve, the first two-position three-way valve, and the second two-position three-way valve are each hydraulically controlled, or controlled through an electrical signal.

8. The control device according to claim 6 , wherein the two-position four-way valve, the first two-position three-way valve, and the second two-position three-way valve are each provided with a damping hole.

Assignees

• Zf Wind Power Tianjin Co Ltd
• Zf Wind Power Antwerpen Nv

Inventors

• Wang Fuliang

Classifications

• F16H3/50

  comprising orbital conical gears · CPC title

• F16H61/0267

  Layout of hydraulic control circuits, e.g. arrangement of valves · CPC title

• F16H61/0206

  Layout of electro-hydraulic control circuits, e.g. arrangement of valves · CPC title

• F16H57/0441

  Arrangements of pumps · CPC title

• F16N2270/00

  Controlling · CPC title